Question

What is refractive Index

Answer 1

Refractive index is the ratio of sine of angle of incidence to sine of angle of refraction. it is constant for a given pair of media.

Answer 2

Hii There!!

Refractive index is defined as the ratio of the speed of light in first medium to the speed of light in second medium in the given substance.

Mathematically,
Refractive index=
speed of light in vaccum/speed of light in medium

NOTE:- Refractive index has 'no unit'.

Hope it helps

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